How to wait for the next v-blank without swapping buffers?

Asked Oct 04 '17 at 11:44

Active Oct 04 '17 at 11:44

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In an OpenGL application using EGL on X11 or Wayland, is there a way to wait for the next v-blank without swapping buffers?

I'm writing an OpenGL app and I only want to redraw when the content actually changes and I still want to have a way to run animations at the screen refresh rate even if I'm not drawing anything.

asked Oct 04 '17 at 11:44

eyelash

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[This Swap Interval wiki link](https://www.khronos.org/opengl/wiki/Swap_Interval) has useful hints. – Ripi2 Oct 04 '17 at 23:14
On x11 you redraw on expose events. Make the animation send expose events to the windows affected by it. – Andreas Oct 06 '17 at 19:10
@Andreas the question is how do I know when to invoke that animation – eyelash Oct 08 '17 at 12:03

How to wait for the next v-blank without swapping buffers?

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